The Blue Heeler, also known as the Australian Cattle Dog, is a medium-sized breed known for its intelligence and agility. Originally bred in Australia for herding cattle, these dogs are highly energetic and require regular exercise. Their short, dense coat is typically blue or mottled, providing protection against harsh weather. Blue Heelers are known for their loyalty and protective nature, making them excellent companions and working dogs. They are highly trainable and thrive on mental stimulation, often excelling in obedience and agility competitions. Socialization from a young age is important to ensure they develop well-rounded temperaments.